<link rel="stylesheet" href="__CDN__/assets/addons/wdsxh/css/diy.css">

<form id="editinfo-form" class="form-horizontal" role="form" data-toggle="validator" method="POST" action="">
  <div class="input-group">
    <div class="col-xs-12 col-sm-8">
      <textarea class="form-control editor" rows="5" name="textareacallback" cols="50" id="textareacallback"></textarea>
    </div>
    <div class="flex">
      <div class="btn-cancel">取 消</div>
      <div class="btn-callback">确 定</div>
    </div>
  </div>
</form>